Study of temperature-programmed desorption of tert-butylamine to measure the surface acidity of solid catalysts

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Industrial and Engineering Chemistry Research; (United States)

OSTI ID:5677464

Aguayo, A T; Arandes, J M; Olazar, M; Bilbao, J ^[1]

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1. Dept. de Ingenieria Quimica, Univ. del Pais, Vasco. Apartado 655, 48080 Bilbao (ES)

In this paper, the technique of temperature-programmed desorption of tert-butylamine is described to measure the surface acidity of solid catalysts. The use of this base has advantages over the use of ammonia, pyridine, and n-butylamine. The desorption measurement is carried out by two methods, gas chromatography and thermogravimetry, and the advised conditions are described for both methods. Catalysts of SiO{sub 2}/Al{sub 2}O{sub 3}, bifunctionals of Ni-SiO{sub 2}/Al{sub 2}O{sub 3}, and a commercial cracking zeolite have been studied. A comparison of the desorption results with those of the other acidity measurement techniques (such as titration with n-butylamine in the liquid phase and kinetic measurement of isomerization of n-butenes as the test reaction) allows the acidity measured with tert-butylamine desorption to be classified as strong, corresponding to the active sites in most of the reactions among the hydrocarbon compounds catalyzed by acids.

• OSTI ID: 5677464
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Vol. 29:8; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM OXIDES
CATALYTIC EFFECTS
AMINES
DESORPTION
BUTYL RADICALS
CATALYSTS
TEMPERATURE EFFECTS
HYDROCARBONS
CATALYTIC CRACKING
SILICON OXIDES
CHEMICAL REACTION KINETICS
GAS CHROMATOGRAPHY
PH VALUE
PHASE STUDIES
SEPARATION PROCESSES
THERMAL GRAVIMETRIC ANALYSIS
ZEOLITES
ALKYL RADICALS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
CRACKING
DECOMPOSITION
GRAVIMETRIC ANALYSIS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RADICALS
REACTION KINETICS
SILICATE MINERALS
SILICON COMPOUNDS
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
020400* - Petroleum- Processing
020500 - Petroleum- Products & By-Products
400105 - Separation Procedures
400201 - Chemical & Physicochemical Properties